Pneumatic fertilizing device

The utility model relates to the technical field of agricultural equipment, in particular to a pneumatic fertilizing device which comprises a storage bin, a feeding pipe and a fertilizing mechanism, the storage bin is communicated and connected with the fertilizing mechanism through the feeding pipe, and the feeding pipe is provided with a feeding mechanism; the fertilizing mechanism comprises a fertilizing barrel, a compressor and a controller, a feeding hole is formed in one end of the fertilizing barrel, the fertilizing barrel is connected with the feeding pipe, the feeding pipe is communicated with the feeding hole, and the fertilizing barrel is provided with a switch component; a fertilization opening is formed in one end, far away from the feeding opening, of the fertilization barrel, and a flexible duckbill valve is arranged at the fertilization opening; an air inlet pipe is arranged on the outer side wall of the fertilizing barrel, one end of the air inlet pipe is in conduction connection with the fer